Oil-dispensing pump.



A. J. POCOCK.

OIL DISPENSING PUMP.

APPLICATION FILED AUG-7. 1916.

1 ,262,697. Patented Apr. 16, 1918.

' I 2 SHEET$$HEET l- 36 LMhi-i T A. -1. POCOCK.

OIL DISPENSING PUMP.

APPLICATION FILED AUG-7.1916.

Patented Apr. 16, 1918.

2 SHEETS-SHEET 2.

OIL-DISPENSING PUMP.

To all whom it may concern:

Be it known that I, AUGUSTINE .J. P0- COCK, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Oil-DispensingPumps; and I do declare the fol lowing to be a full,'clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, andv to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in pumps of a type which is designed for discharging liquids in measured quantities and is of the single-acting single cylinder type. The objects of the invention are several, principally among which is to provide a generally improved form of construction in which the body of the pump may be cast in one piece thus facilitating the manufacture as well as economizing in the cost of manufacture. The present application'is divided from my pending application, Serial No. 36,443, filed June 26, 1915. With reference .to the general design or construction of the pump, the improved characteristics thereof relate to means for fastening in the cylinder and for forming the body of the pump for the application of insulation. The body of the pump is cast in one piece in such form as to enable it to be bored so that the tube may be tight and. the recess for the insulating material provided.

Preceding a more detail description of my invention, reference is made to the accompanying drawings of which Figures 1 and 2 are vertical front and side elevations, respectively, showing the pump intact; Fig. 3 is a vertical sectional elevation of the lower portion of the pump broken at the middle to facilitate the illustration; Fig. 4 is an enlarged illustration of the driving gear box and reversing gears on the line 4-4 of Fig. 1; Fig. 5 is a side elevation of the driving gears and adjunctive parts; Fig. 6 is a sectional view of the head and adjacent parts of the discharge pipes showing a form of vacuum breaker on the interior of said head; Fig. 7 is a cross-sectional view of the cylinder on the line ,7-7 of .Fig. 3. Fig. 8 is a sectional V16W'Of'thB Specification of Le tters Patent. Patented; Apr. 16, 1918.,

Original application filed June 26, 1915, Serial No. 36,443. Divided and Serial No. 113,493.

this application filed August 7,1916.

sealing device for the stop, the same being 'on the line 8-8 of Fig. 1.

In a detail description of the invention, similar reference characters indicate corresponding parts in both the description to follow and the accompanying drawings.

Referring more specifically to these draw ings, 1 designates the casting forming the main portionv or body of the pump and terminating in alower base portion 1' constructed for a rigid attachment to a suitable support, and an upper head 28. This body or casting is especially constructed for the attachment ofoppositely disposed inclosing plates 2-2, and an inner cylinder 3. The making of the body or casting 1 in one piece, as described, enables it to be bored with much facility so that the cylinder 3 may be driven tightly into its position, the upper portion of said cylinder being flared outwardly against a corresponding flaring portion 45 of the casting, and forced into an annular groove 45*, as plainly shown in Fig. 3. The-lower end of the cylinder 3 is driven tightly against flanges 45 and 45 of said casting which provide an effective seat for that end of said cylinder. This conapplication of a jacket of insulating material 4 to be placed around the cylinder 3 within the surrounding space. The insulating material '4 maybe such as cork or any other material having the proper etfi tion and replacing it whenever such be comes necessary. The top or head 28 provides a chamber 28 which is closed by a cap 7 46, and into which is discharged the liquid upon each upstroke of the piston, to be presently described. The lower portion of the pump is provided with an initial inlet struction very conveniently providesfor the 1 chamber 24 which is fed through an inlet 43 and above said chamber 24 the pump is provided with a hand opening which is closed by a screw-cap 44 and through which access mayv be had to the suction valve, presently described. The suction valve-25 seats in a suitable opening above the chamber 24 and controls the admissiontherefrom.

When not affected by the discharge stroke of the piston 21, the said valve is maintained upon its seat. In order to apply a suitable additional pressure on said valve when so seated and to maintain an effective seating, a spring 26 is provided thereon.

This spring is affected bv a stirrup or frame 23 which ,is secured, to the bottom of the uponeach descent of said piston and closes upon the return upstroke thereof. A. yoke 21 provides a sultable means for connectlng the piston rod 22 which passes through a suitable packed opening in the cap 46. A driving rack 8 is connected to the piston rod 22 and is held in mesh with the gear 9 by a roller Q0. The said rack 8 extends into a gearbox 5 mounted upon an air pipe 30 and discharge pipe 29 which extend from the pump head 28. The rack 8 is driven from a system of reversing gears which forms the subject matter of my co-pending application. This system of gearing is, however, illustratedin Figs. a and 5 of the drawings where it will be seen that the rack S is in constant mesh with a driving gear 9 pinned to a shaft 6 'journaled in the upper part of the gear casing or box 5. The driving gear 9 is adapted to be driven in oppoite directions by gears 10 and 12, the former of which is mountedon a shaft 7 journaled in the lower part of the gear box -5 and operated from a crank iandle 35.

The gear 12 is fixed to the driving gear 9 both of which move with the shaft 6. A

pinion 11 also runs on the shaft 7 and meshes with the gear 12. Reverse movements are imparted to the driving gear 9 and, to the rack and piston by the ears 10 and 11 and these gears are controlled by clutch members 15- and 16 which are fixed, respectively, to said gears. Cooperating with. said clutch members 15 and 16 are clutch members it and 17, respectively,

which are slidably mounted on the shaft 7. The outer ends of these clutch members 14 and 17 have each a spiral cam slot which provides inner and outer cam surfaces 19 and 19 and end abutments 18 and 18. The clutch members 14 and 17, as before stated, slide upon the shaft'Z, and are rotated by double-acting cams 20 and 20" and the tapered surfaces 19 and 19'. of the clutch members,- a nd the rotary movement takes place when said cams engage the abutments 18 and 18. Means are provided for preventing thr clutch members 14; and 17 rotating while the cams 20 and 20 are moving against the incline surfaces 19 and 19 and until the abutments 18 and 18 are. engaged to rotate said clutch members. This'means consists of brake-s orshoes 81' suit-ably arranged to engage the periphery31 of said clutch members. These friction devices may be suitably mounted on arms 32 conveniently mounted on the pump frame, as shown in Fig. 5, wherein one of said arms 32 is shown to be connected to a crossbar 32'. Suitable pressure is applied to said shoe by springs 33 conveniently attached at one end to the arms 32 andvthe other ends of which are provided with adjusting connections in the form of hook-bolts '34..

From the foregoing description, it will be seen that the rack 8 and therewith the pump piston are given reciprocatory movement from the gear 9, one direction of such movement being imparted from the crank handie 35 to the shaft 7, clutch members 4 and 5, and gear 10, and the other direction of movement being imparted through the clutch members 16 and 17, and gears 11 and 12. Owing to the differentialof the gears,

the idle stroke of the piston is obtained in a much shorter space'of time which is an advantage due to the system of gears described.

The discharge pipe 29 leading from the chamber 28 communicates with a chambered head 31 froinwhich a discharge spout 36 extends. A suitable length of hose (not shown) may be attached to the discharge pipe 36. The discharge of oil through said spout and hose has a tendency to siphon and to thereby interfere withcorrect discharges or measurements-of oil. Inasmuch, however, as siphoningcannot occur without what is commonly termed a vacuum at the head of the discharge pipe, I have provided what may be termed a vacuum breaker as a preventative consisting of a diaphragm 37' mounted in the-top of the head 34: and having an orifice 38 and. a button 89 of suitable material such as leather secured to the cap of said head. By the said diaphragm closing against said button, the exclusion of air from the chamber below takes place, thereby constituting what may be termed an automatic vacuum breaker. The discharge stroke of the piston is regulated through stops -11 arranged at suitable points along a rod 12 mounted between the head 28 and gearbox 5. These stops may limit the piston to a one-half'gallon, gallon, two gallon, and two and a half gallon stroke, and the rod 42 is turned to bring said stops in or out of alinementwith a shoulders? onthe lower end of the rack 8. Such operation is given saidrod' 12 bymeans of a hand rod or bar 48 suitably mounted. When a particular stop 41 is placed in position, it may be locked and sealed in such position. This is accomplished by means of a series of members 49, one connected to each stop 41. The said members 49 have a screw-threaded connection with a rod 50 mounted adjacent to and parallel with the stop rod 42. The said members 49 have each a series of recesses 51 in which a sealing rod 52 lies. This rod may be sealed in any suitable manner. In the drawings I have shown the end thereof projected through an opening in a lug 53 on a side of the screening Or filteringcase 54.

Having described my invention, I claim,

1. In a pump structure, a cylinder comprising a casting providing an inlet chamber at one end and an outlet chamber at the other end, the portion of said casting above the inlet chamber having a seat and the por tion below the outlet chamber having an inwardly lying flange in alinement with said seat and the inner surface of which is substantially of a flaring form, a cylinder the lower end of which firmly engages said seat and the upper end of which firmly engages said flaring surface.

2. In a pump structure, a cylinder comprising a casting providing an inlet chamber at one end and an outlet chamber at the other end, the portion of said casting above the inlet chamber having a seat and the portion below the outlet chamber having an inwardly lying flange the inner surface of which is of substantially a flarin form, a cylinder the lower end of which rmly engages said seat and the upper end of which firmly engages said flaring surface, an insulating jacket inclosing said cylinder between its attached ends, and covered openings in the side of said casting communicating with the space surrounding said insulating jacket and enabling access thereto.

3. In a pump, a cylinder comprising a casting providing an inlet chamber at one end and an outlet chamber at the other end, the portion of said casting above the inlet chamber having a seat and the portion below the outlet chamber having an inwardly lying flange with a tapered surface in alinement with said seat, a cylinder the lower end of which firmly engages said seat, and the upper end of which firmly engages said flaring surface, a piston movable in said cylinder, and an inlet valve carried by said piston.

4. In a pump, a cylinder comprising a casting providing an inlet chamber at one end and an outlet chamber at the other end,

the portion of said casting above the inlet chamber leaving an annular seat and the portion below the outlet chamber having an inwardly lying annular flange with a tapered surface in alinement with said seat, a cylinder the lower end of which firmly engages said seat and the upper end of which firmly engages said tapered surface, and a piston within said cylinder and adapted to engage said seat when at the lowermost limit of its stroke.

5. In a pump, the combination with a pump body providing a lower inlet chainber, a piston cylinder rigidly engaging inwardly lying portions of said pump body, a suction valve controlling said inlet chamber, a springcarried by said suction valve, apiston movable in said cylinder, and a frame member extending from said piston in a position to engage said spring when the piston is in the lowermost position of its travel and whereby said suction valve is maintained upon its seat by elastic pressure.

6. In a pump of the character specified, the combination of a pump body having openings in the sides thereof closed by detachable plates, a cylinder lying inwardly from said openings, an insulating jacket surrounding said cylinder, a piston within said cylinder, an inlet valve carried by said piston, a suction valve below said inlet valve, and elastic means interposed between the piston and said suction valve and whereby the suction valve is maintained upon its seat by elastic force when the piston has reached the lowermost position of its travel.

AUGUSTINE J. POCOGK.

WVitnesses MELLIE GALLOWAY, M. SIEBLER.

some of this patent may be obtained for five cents each, by addressing the Gommissionerof Patents,

' Washington, D. G. 

